Thermodynamics Online Test – Multiple Choice Questions and Answers Posted on April 16, 2024April 16, 2024 by engineer4 Comments 1. Which is the incorrect statement about Carnot cycle? It provides concept of maximising work output between the two temperature limits It is used as the alternate standard of comparison of all heat engines All the heat engines are based on Carnot cycle all of the above 2. One kg of carbon requires 4/3 kg of oxygen and produces __________ kg of carbon monoxide gas 7/3 11/7 8/3 11/3 3. The entropy of water at 0°C is assumed to be 1 -1 2 0 4. The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by Boyle’s law Charles’ law Gay-Lussac law all of these 5. The efficiency of Joule cycle is greater than Carnot cycle less than Carnot cycle equal to Carnot cycle none of these 6. During which of the following process does heat rejection takes place in Carnot cycle? Isentropic compression Isentropic expansion Isothermal expansion Isothermal compression 7. The fuel mostly used in steam boilers is coking bituminous coal peat non-coking bituminous coal brown coal 8. An isothermal process is governed by Avogadro’s law Charles’ law Boyle’s law Gay-Lussac law 9. Reheating in a gas turbine decreases the thermal efficiency increases the thermal efficiency increases the turbine work increases the compressor work 10. According to Avogadro’s law the product of the gas constant and the molecular mass of an ideal gas is constant equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules the sum of partial pressure of the mixture of two gases is sum of the two all of the above Loading … Question 1 of 10
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Q.No. 5 is wrong .
Its answer is brown coal
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